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RST – Transformer Switchgear of MV/LV Pole Stations

0,00  with VATPL

SKU: RST Category:


  • in terms of electricity distribution
  • protection of outlet circuits on the nN side
  • protection of electrical equipment against the effects of short circuits and surges and in distribution networks
  • for balancing energy consumption and control measurements
  • can operate in TN-S, TN-C, TN-C-S, TT and IT three-phase networks
  • designed to be mounted under a transformer on a pole


Aluminum OU-1/OU-2

  • aluminum sheet of minimum thickness: 2 mm, bent, joined with welds, suitable for side fixing;
  • High mechanical strength and degree of protection,
  • which prevents dust ingress and mechanical damage;
  • Powder coated in any color (e.g.: RAL 7032, 7035);
  • The dimensions of the switchboard are arbitrary, adapted to the individual needs of the customer.
  • The aluminum housing is made in protection class I or II.

Common features of the enclosures OU

  • Double-sided doors, separate for each module,
  • Opening at 180 degrees, three-point locking;
  • Interior hinges with an anti-burglary catch;
  • Basquil lock lockable with padlock or system cylinder;
  • gable or envelope roof equipped with fireplaces
  • with diameters adapted to the dimensions of multi-finger shrink heads;
  • The bottom of the enclosure has an opening that allows cables to be inserted through the cable channel;
  • marking of the switchgear with durable engraved plastic plates, allowing identification of all relevant components.

    The housing has a ventilation maze to prevent water and moisture accumulation.


  • K-AL cable duct, made of aluminum sheet or composite, in any color. The dimensions of the channel are adapted to the number of circuits and the height of the housing installation;
  • FM metal or FB concrete foundation that allows the switchgear enclosure to be placed as a free-standing enclosure at the station pole;
  • OM mounting clamps made of galvanized steel profiles, allowing direct mounting of the switchgear on the pole.
  • The design of the housing provides any spacing and shape of the clamps;
  • “P” base allows additional support and support points for the switchgear enclosure with non-standard equipment, such as increasing the number of apparatus and devices, rail cross-section.

Current paths

  • Current paths made of bolted copper flat bars with a cross-section matched to the current load, equipped with pressed-in rivet nuts to allow installation work on live strip apparatus;
  • PEN bus with the possibility of splitting into PE and N.

MZ/MO – supply and drain module

  • Power supply made by separate V or VLM type terminals for two cables up to 2x4x240A and 4x240A;
  • Feeding strip and box fuse disconnectors or power circuit breakers: 400/630/910/1250 A with KPW fuse-layer burnout control or without fuse-layer burnout control;
  • Power supply to the generator field 400 A/630 A strip disconnector;
  • Outlet disconnectors or fuse bases of strip and box fuses 160/250/400/630/910 A with or without KPW fuse-link burnout control;
  • Current transformers of the measuring and balancing module selected in accordance with the guidelines of the distributor and energy seller;
  • Shielded reserve circuits without and with control of insert burnout.

MP – measuring-balancing module in accordance with the guidelines of the distributor
and energy sellermeasuring-balancing module in accordance with the guidelines of the distributorand energy seller

SON – lighting module, a system for controlling the street lighting of the traffic route around the station.

Rated parameters

Rated switching voltage:230/400 V
Rated insulation voltage:690 V
Rated frequency:50 Hz
Surge voltage withstanding:12 kV
Rated continuous current of the main rails:400/630/910/1250 A
Rated continuous current of drain rails;160/250/400/630/910 A
Rated short-term withstand current:20 kA (1 s.)
Rated peak withstand current:40 kA
Short-circuit current of internal arc discharge:16 kA
IP rating:44
IK degree of mechanical resistance:10
Protection class:I/II
Network layouts:TN-S, TN-C, TN-C-S, TT, IT

Compliance with standards

PN-EN 61439-1
“Low-voltage switchgear and controlgear – Part 1: General provisions”;

PN-EN 61439-2

“Low-voltage switchgear and controlgear – Part 2: Switchgear and controlgear
for power distribution””Low-voltage switchgear and controlgear – Part 2: Switchgear and controlgearfor power distribution”


“Shielded low-voltage switchgear and controlgear. Guidelines for testing under arc discharge conditions resulting from an internal short circuit”;

PN-EN 50274

“Low-voltage switchgear and controlgear – Protection against electric shock – Protection against unintentional direct contact of hazardous live parts”;

PN-EN 62208

“Empty enclosures for low-voltage switchgear and controlgear. General requirements”;

PN-EN 60529

“Degrees of protection provided by enclosures (IP Code)”;

PN-EN ISO 4628

“Paints and varnishes – Evaluation of damage to coatings – Determination of the amount and extent of damage and the intensity of uniform changes in appearance – Part 6: Evaluation of the degree of chalking by the tape method.”

PN-EN ISO 2409

“Paints and Varnishes – Testing by the Notch Grid Method.”

PN-EN 62262

“Degrees of protection against external mechanical impact provided by enclosures of electrical equipment (IK code) (IDT PN-EN 50102:2001)”.